Dell OptiPlex GX150 User Manual page 118

1. Open the computer cover.
2. If necessary, remove any DIMMs that occupy sockets in which you plan to install the upgrade DIMMs.
3. Install the upgrade DIMMs.
a. Locate the plastic securing clips at each end of the socket.
b. Press the clips outward until they snap open.
c. Press the DIMM straight into the slot running down the center of the socket until the securing tabs snap into place around the ends
of the DIMM.
Installing a DIMM
4. Close the computer cover, reconnect your computer and peripherals to their electrical outlets, and turn them on.
NOTE: After you open and close the cover, the chassis intrusion detector causes the following message to appear on the screen
at the next system start-up:
ALERT! Cover was previously removed.
You will need to reset
The system detects that the new memory does not match the existing system configuration information and generates the following
message:
The amount of system memory has changed.
Strike the F1 key to continue, F2 to run the setup utility
5. Press <F2> to enter system setup, and check the value for System Memory.
The system should have already changed the value of System Memory to reflect the newly installed memory. Verify the new total. If it is
correct, skip to step 7.
6. If the memory total is incorrect, turn off and disconnect your computer and peripherals from their electrical outlets.
and check the installed DIMMs to make sure that they are seated properly in their sockets. Then repeat
7. Reset the chassis intrusion detector by changing Chassis Intrusion to Enabled or Enabled-Silent.
NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting
the chassis intrusion detector.
8. When the System Memory total is correct, press <Esc> to exit system setup.
9. Run the Dell Diagnostics
Removing DIMMs
To remove a DIMM, press the securing clips outward simultaneously until the DIMM disengages and pops out slightly from the socket.
Removing a DIMM
the chassis intrusion detector.
to verify that the DIMMs are operating properly.
1 Securing clips (2)
2 Slot
Open the computer cover,
steps 3, 4, and 5.